Biochemical Engineering

Question: Zeolite softening process removes both temporary and permanent hardness of water. In this process the calcium and magnesium present in water are precipitated as
[A].

insoluble carbonates

[B].

insoluble zeolites

[C].

insoluble chlorides

[D].

insoluble sulfates

Answer: Option B

Explanation:

No answer description available for this question.

Question: Zeolite softening process removes
[A].

only temporary hardness of water

[B].

only permanent hardness of water

[C].

both temporary and permanent hardness of water

[D].

the dissolved gases in permanent hard water

Answer: Option C

Explanation:

No answer description available for this question.

Question: Permanent hard water may be softened by passing it through
[A].

sodium silicate

[B].

sodium bicarbonate

[C].

sodium hexametaphosphate

[D].

sodium phosphate

Answer: Option C

Explanation:

No answer description available for this question.

Question: Permanent hardness of water may be removed by the addition of
[A].

lime

[B].

soda ash

[C].

potassium permagnate

[D].

sodium bicarbonate

Answer: Option B

Explanation:

No answer description available for this question.

Question: Both temporary and permanent hardness of water can be removed on boiling water with
[A].

calcium hydroxide

[B].

sodium carbonate

[C].

calcium oxide

[D].

calcium carbonate

Answer: Option B

Explanation:

No answer description available for this question.

Question: Both temporary and permanent hardness of water can be removed by
[A].

boiling

[B].

distillation

[C].

filtration

[D].

decantation

Answer: Option B

Explanation:

No answer description available for this question.

Question: Permanent hardness of water is caused by the presence of
[A].

bicarbonates of calcium and magnesium

[B].

carbonates of sodium and potassium

[C].

chlorides and sulfates of calcium and magnesium

[D].

phosphates of sodium and potassium

Answer: Option C

Explanation:

No answer description available for this question.

Question: When temporary hard water is boiled, one of the substances formed is
[A].

calcium bicarbonate

[B].

calcium sulfate

[C].

hydrogen chloride

[D].

carbon dioxide

Answer: Option D

Explanation:

No answer description available for this question.

Question: Temporary hardness of water may be removed by adding
[A].

calcium hydroxide

[B].

calcium carbonate

[C].

calcium chloride

[D].

sodium bicarbonate

Answer: Option A

Explanation:

No answer description available for this question.

Question: Temporary hardness of water is caused by the presence of
[A].

chlorides of calcium and magnesium

[B].

sulfates of calcium and magnesium

[C].

bicarbonates of calcium and magnesium

[D].

carbonates of sodium and potassium

Answer: Option C

Explanation:

No answer description available for this question.